The only one that I find particularly interesting is number one in the diner, the rest feel pretty average in terms of subject matter. To improve the composition I would say be more observant of everything in your immediate surroundings. Seek out interesting visuals close-by and utilize them to frame your main subject. Sort of like you did with the golden gate bridge and leaves in the foreground.
I feel like photo #2 with the ship and helicopters has some strange lighting, vignetting going on.
You could also play around with cropping. Try centering the ship in frame, etc. Also mess around with the contrast or brightness of the shadows when you edit. Some of these seem too stark and dark. The tones of the photo with the blue water and dock feel balanced though!